Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 177 insertions, 0 deletions

diff --git a/tools/workqueue/wq_dump.py b/tools/workqueue/wq_dump.py
new file mode 100644
index 0000000000..d0df5833f2
--- /dev/null
+++ b/tools/workqueue/wq_dump.py
@@ -0,0 +1,177 @@
+#!/usr/bin/env drgn
+#
+# Copyright (C) 2023 Tejun Heo <tj@kernel.org>
+# Copyright (C) 2023 Meta Platforms, Inc. and affiliates.
+
+desc = """
+This is a drgn script to show the current workqueue configuration. For more
+info on drgn, visit https://github.com/osandov/drgn.
+
+Affinity Scopes
+===============
+
+Shows the CPUs that can be used for unbound workqueues and how they will be
+grouped by each available affinity type. For each type:
+
+  nr_pods   number of CPU pods in the affinity type
+  pod_cpus  CPUs in each pod
+  pod_node  NUMA node for memory allocation for each pod
+  cpu_pod   pod that each CPU is associated to
+
+Worker Pools
+============
+
+Lists all worker pools indexed by their ID. For each pool:
+
+  ref       number of pool_workqueue's associated with this pool
+  nice      nice value of the worker threads in the pool
+  idle      number of idle workers
+  workers   number of all workers
+  cpu       CPU the pool is associated with (per-cpu pool)
+  cpus      CPUs the workers in the pool can run on (unbound pool)
+
+Workqueue CPU -> pool
+=====================
+
+Lists all workqueues along with their type and worker pool association. For
+each workqueue:
+
+  NAME TYPE[,FLAGS] POOL_ID...
+
+  NAME      name of the workqueue
+  TYPE      percpu, unbound or ordered
+  FLAGS     S: strict affinity scope
+  POOL_ID   worker pool ID associated with each possible CPU
+"""
+
+import sys
+
+import drgn
+from drgn.helpers.linux.list import list_for_each_entry,list_empty
+from drgn.helpers.linux.percpu import per_cpu_ptr
+from drgn.helpers.linux.cpumask import for_each_cpu,for_each_possible_cpu
+from drgn.helpers.linux.idr import idr_for_each
+
+import argparse
+parser = argparse.ArgumentParser(description=desc,
+                                 formatter_class=argparse.RawTextHelpFormatter)
+args = parser.parse_args()
+
+def err(s):
+    print(s, file=sys.stderr, flush=True)
+    sys.exit(1)
+
+def cpumask_str(cpumask):
+    output = ""
+    base = 0
+    v = 0
+    for cpu in for_each_cpu(cpumask[0]):
+        while cpu - base >= 32:
+            output += f'{hex(v)} '
+            base += 32
+            v = 0
+        v |= 1 << (cpu - base)
+    if v > 0:
+        output += f'{v:08x}'
+    return output.strip()
+
+worker_pool_idr         = prog['worker_pool_idr']
+workqueues              = prog['workqueues']
+wq_unbound_cpumask      = prog['wq_unbound_cpumask']
+wq_pod_types            = prog['wq_pod_types']
+wq_affn_dfl             = prog['wq_affn_dfl']
+wq_affn_names           = prog['wq_affn_names']
+
+WQ_UNBOUND              = prog['WQ_UNBOUND']
+WQ_ORDERED              = prog['__WQ_ORDERED']
+WQ_MEM_RECLAIM          = prog['WQ_MEM_RECLAIM']
+
+WQ_AFFN_CPU             = prog['WQ_AFFN_CPU']
+WQ_AFFN_SMT             = prog['WQ_AFFN_SMT']
+WQ_AFFN_CACHE           = prog['WQ_AFFN_CACHE']
+WQ_AFFN_NUMA            = prog['WQ_AFFN_NUMA']
+WQ_AFFN_SYSTEM          = prog['WQ_AFFN_SYSTEM']
+
+print('Affinity Scopes')
+print('===============')
+
+print(f'wq_unbound_cpumask={cpumask_str(wq_unbound_cpumask)}')
+
+def print_pod_type(pt):
+    print(f'  nr_pods  {pt.nr_pods.value_()}')
+
+    print('  pod_cpus', end='')
+    for pod in range(pt.nr_pods):
+        print(f' [{pod}]={cpumask_str(pt.pod_cpus[pod])}', end='')
+    print('')
+
+    print('  pod_node', end='')
+    for pod in range(pt.nr_pods):
+        print(f' [{pod}]={pt.pod_node[pod].value_()}', end='')
+    print('')
+
+    print(f'  cpu_pod ', end='')
+    for cpu in for_each_possible_cpu(prog):
+        print(f' [{cpu}]={pt.cpu_pod[cpu].value_()}', end='')
+    print('')
+
+for affn in [WQ_AFFN_CPU, WQ_AFFN_SMT, WQ_AFFN_CACHE, WQ_AFFN_NUMA, WQ_AFFN_SYSTEM]:
+    print('')
+    print(f'{wq_affn_names[affn].string_().decode().upper()}{" (default)" if affn == wq_affn_dfl else ""}')
+    print_pod_type(wq_pod_types[affn])
+
+print('')
+print('Worker Pools')
+print('============')
+
+max_pool_id_len = 0
+max_ref_len = 0
+for pi, pool in idr_for_each(worker_pool_idr):
+    pool = drgn.Object(prog, 'struct worker_pool', address=pool)
+    max_pool_id_len = max(max_pool_id_len, len(f'{pi}'))
+    max_ref_len = max(max_ref_len, len(f'{pool.refcnt.value_()}'))
+
+for pi, pool in idr_for_each(worker_pool_idr):
+    pool = drgn.Object(prog, 'struct worker_pool', address=pool)
+    print(f'pool[{pi:0{max_pool_id_len}}] ref={pool.refcnt.value_():{max_ref_len}} nice={pool.attrs.nice.value_():3} ', end='')
+    print(f'idle/workers={pool.nr_idle.value_():3}/{pool.nr_workers.value_():3} ', end='')
+    if pool.cpu >= 0:
+        print(f'cpu={pool.cpu.value_():3}', end='')
+    else:
+        print(f'cpus={cpumask_str(pool.attrs.cpumask)}', end='')
+        print(f' pod_cpus={cpumask_str(pool.attrs.__pod_cpumask)}', end='')
+        if pool.attrs.affn_strict:
+            print(' strict', end='')
+    print('')
+
+print('')
+print('Workqueue CPU -> pool')
+print('=====================')
+
+print('[    workqueue     \     type   CPU', end='')
+for cpu in for_each_possible_cpu(prog):
+    print(f' {cpu:{max_pool_id_len}}', end='')
+print(' dfl]')
+
+for wq in list_for_each_entry('struct workqueue_struct', workqueues.address_of_(), 'list'):
+    print(f'{wq.name.string_().decode()[-24:]:24}', end='')
+    if wq.flags & WQ_UNBOUND:
+        if wq.flags & WQ_ORDERED:
+            print(' ordered   ', end='')
+        else:
+            print(' unbound', end='')
+            if wq.unbound_attrs.affn_strict:
+                print(',S ', end='')
+            else:
+                print('   ', end='')
+    else:
+        print(' percpu    ', end='')
+
+    for cpu in for_each_possible_cpu(prog):
+        pool_id = per_cpu_ptr(wq.cpu_pwq, cpu)[0].pool.id.value_()
+        field_len = max(len(str(cpu)), max_pool_id_len)
+        print(f' {pool_id:{field_len}}', end='')
+
+    if wq.flags & WQ_UNBOUND:
+        print(f' {wq.dfl_pwq.pool.id.value_():{max_pool_id_len}}', end='')
+    print('')